<div class="panel-heading">
    <h4 class="widget-title">标签云</h4>
</div>
<div class="tagcloud panel-body">
    <span class="tag" ng-repeat="(tag, posts) in tags"
          ng-init="index = (tagNamesSorted|limitTo:widget.limit).indexOf(tag)">
        <a ng-if="index > -1" ng-href="#/tag/{{tag}}"
           ng-style="{'font-size': (widget.limit-9)/(index+1)+9+'px'}">
            {{tag}}
        </a>
    </span>
</div>